Fundamental differences are:
1. HK45 decocker is on the frame, P30's is on the slide.
2. Interchangeable side inserts on P30, none on HK45
3. P30 comes with S, M, and L backstraps. HK45 comes with M and L.
4. Safety + decocker on same lever on HK45, separate safety lever and decocker on P30S
The P30L is about 1/2 inch longer than the P30. Let me know if you want some pics.
1. HK45 decocker is on the frame, P30's is on the slide.
2. Interchangeable side inserts on P30, none on HK45
3. P30 comes with S, M, and L backstraps. HK45 comes with M and L.
4. Safety + decocker on same lever on HK45, separate safety lever and decocker on P30S
The P30L is about 1/2 inch longer than the P30. Let me know if you want some pics.